A kind of silicate-based lightweight foam concrete and its preparation method

Abstract

The invention discloses silicate-based light-weight foam concrete and a preparation method thereof. The silicate-based light-weight foam concrete is prepared from silicate cement, an inorganic admixture, water, a foaming agent and an additive, wherein the mass ratio of the inorganic admixture to the silicate cement is 0.3 to 1.3; the water accounts for 35 to 65 percent by mass; and the foaming agent accounts for 3 to 10 percent by mass. The silicate-based light-weight foam concrete has the beneficial effects that the silicate cement is used as a cementing material; and compared with a sulfoaluminate-based material, the silicate-based light-weight foam concrete has the advantages that the carbonation resistance, the mechanical performance stability, the temperature tolerance and other properties are improved. By adjustment of the contents of all functional components (a thickening time control agent, a foam stabilizer, a water reducing agent, an anti-cracking component, an expanding agent and the like), the silicate-based light-weight foam concrete can conform to various preparation conditions of the silicate cement used as a base material.

Description

technical field [0001] The present invention relates to the professional field of material engineering and application, in particular to a type of silicate-based lightweight foam concrete which can be formed in situ or can be prefabricated for airport runway end characteristic material arresting system (Engineered Material Arresting System, referred to as EMAS) and its preparation method. Background technique [0002] Statistical data both at home and abroad show that among the accidents that seriously endanger the safety of civil aviation flight, the aircraft overshooting / deviating from the runway ranks first. important. ICAO stipulates in "Annex 14-Airports" that for instrument runways with reference codes 1 or 2 and runways with reference codes 3 or 4, a runway end safety zone must be set. The length of the safety zone at the end of the runway should not be less than 90m from the lifting belt, and it is recommended to reach 240m. However, due to the constraints of geog...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the foam concrete in the prior art does not meet the compressive strength requirements of EMAS characteristic materials, it cannot meet the requirements for the use of the airport runway end characteristic material arresting system, and the current concrete mainly uses sulphoaluminate cement as the main material, and sulfur Aluminate cement has the phenomenon of late strength shrinkage, and the ettringite in the hydration product is highly sensitive to temperature, which is easy to decompose or transform and affect the stability of the matrix; low alkalinity also leads to poor carbonation resistance, which affects water quality. Product stability

Images